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  <meta charset="utf-8">
  <title>课程表</title>
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    table {
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      border: 2px solid rgb(200, 200, 200);
      letter-spacing: 1px;
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    th {
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      padding: 10px 20px;
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<body>
  <h1>课程表</h1>

  <table>
    <caption>张三的课程表</caption>
    <colgroup>
      <col span="2">
      <col style="background-color:#97DB9A;">
      <col style="width:42px;">
      <col style="background-color:#97DB9A;">
      <col style="background-color:#DCC48E; border:4px solid #C1437A;">
      <col span="2" style="width:42px;">
    </colgroup>
    <tr>
      <td>&nbsp;</td>
      <th>星期一</th>
      <th>星期二</th>
      <th>星期三</th>
      <th>星期四</th>
      <th>星期五</th>
      <th>星期六</th>
      <th>星期日</th>
    </tr>
    <tr>
      <th>第一节</th>
      <td>英语</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
      <td>德语</td>
      <td>荷兰语</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <th>第二节</th>
      <td>英语</td>
      <td>英语</td>
      <td>&nbsp;</td>
      <td>德语</td>
      <td>荷兰语</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <th>第三节</th>
      <td>&nbsp;</td>
      <td>德语</td>
      <td>&nbsp;</td>
      <td>德语</td>
      <td>荷兰语</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <th>第四节</th>
      <td>&nbsp;</td>
      <td>英语</td>
      <td>&nbsp;</td>
      <td>英语</td>
      <td>荷兰语</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>


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